Sounds like you have a texture.hogg file corruption,
Try force verifying , Select "Force Verify" after clicking on the orange "Options" menu in the game login screen and login into the game normally. Once the game has completed verifying and re-patching the missing game files try again. IF you get the same error try deleting the texture.hogg file and let the patchier download that file for you again.
Please delete the C:\Program Files\Cryptic Studios\Star Trek Online\Live\piggs\texture.hogg" file, start the game client again and let the game patch that file.